您现在的位置：首页 > 技术方案 >工业控制 > IDT P95020音频设备系统的整体解决方案

IDT P95020音频设备系统的整体解决方案

来源： eccn

2019-06-27

类别：工业控制

拍明

原标题：IDT P95020音频设备系统的整体解决方案

　　IDT公司的P95020是新一代标准的专用控制器，集成了通用微控制器，包括耳机输出和2.5W D类音频放大器的高清音频CODEC，全部的功率管理功能，触摸屏控制器和实时时钟，特别适合手机，手持游戏设备，数字媒体播放器，手持导航系统等。本文介绍了P95020主要特性，方框图，IDTP95020评估板主要特性，电路图和材料清单。

　　The IDT P95020 is the first of a new generation of standardized application-specific controllers that incorporates a General Purpose Microcontroller, a high fidelity Audio CODEC including Headphone Outputs and a 2.5W Class D Audio Amplifier, full Power Management functionality, a Touch Screen Controller and a Real Time Clock all of which are required by portable consumer devices such as cellular phone handsets, portable gaming devices, digital media players, portable navigational devices, etc.

　　The IDTP95020 is designed to provide maximum flexibility to system designers by providing full customization and programmability. It is a highly integrated single chip device that incorporates an embedded general purpose microcontroller, a high fidelity audio CODEC, full power management functionality, backlight driver, battery charger, touch screen controller, and real time clock, all of which make it an ideal solution for portable consumer devices, such as cellular phone handsets, portable gaming devices, digital media players, and portable navigational devices.

　　The device compact footprint optimizes board area and reduces component count.

　　The IDTP95020 embedded Microcontroller features 4kB factory-programmable ROM, or the I²C master can load a custom program from an external EEPROM module. The system power-on/power-off sequencing and general system housekeeping can be programmed in internal ROM or external EEPROM. The I²C slave can be used during operation to communicate with the host to accept commands and report status.

　　The IDTP95020 operates from an adapter or USB power source to deliver power to the system load while charging the battery; up to 1.5A charging current. The input current is limited to the value set by the host for adapter source (up to 2A) or for USB source (100mA or 500mA). The switch-mode EnergyPathTM Battery Charger operates with a high efficiency buck regulator to transmit the power to the load with minimal loss.

　　The IDTP95020 power management features along with the switching regulators and LDOs can provide power for most extremely complex hand-held devices.

　　The device is offered in a small 132-ld 10x10x0.85mm QFN package and guaranteed to operate over the commercial temperature range 0°C to 70°C.

　　P95020主要特性：

　　 Quick Turn Customization

　　 Embedded Microcontroller

　　- Master controller during power-up and power-down

　　- Power up/down sequence field programmable with external EEPROM

　　- Dynamic power management via I²C bus interface

　　- Up to 10 general purpose I/Os

　　- Housekeeping for IDTP95020 and other devices

　　 Audio - 4 Channel CODEC with 24-bit resolution

　　- Integrated 2.5W mono Class D amplifier with filterless operation

　　- Stereo cap-less headphone driver

　　- Differential analog audio line inputs

　　- Dual mode microphone inputs (analog or DMIC)

　　 Battery Charger for Li-Ion / Li-Polymer up to 1.5A

　　- High efficiency switch-mode EnergyPath™ controller with advanced safety features

　　- USB or AC adaptor power input (5V)

　　- Programmable current limit

　　- Internal 180mΩ ideal diode with external ideal diode controller

　　 Buck DC-DC PWM converters with PFM mode

　　- 2x at 500mA, 0.75V to 3.7V output

　　- 1x at 1000mA, 0.75V to 3.7V output

　　 Boost DC-DC PWM converter

　　- 1x at 1.5A peak current, 4.05V to 5.0V output

　　 2-ch white LED driver with 2W total output power

　　- Two programmable current sinks, 25mA each

　　- Voltage limited to rating of external FET and diode

　　 Linear regulators

　　- 3x at 150mA, 0.75V to 3.7V output

　　- 4x at 50mA, 0.75V to 3.7V output

　　- 1x at 10mA, 3.3V or 3.0V output, always-on

　　 ADC and Touch Screen Controller

　　- 12 bit resolution, Sample rate 62.5kSPS, DNL -

　　1~+2LSB, INL +/-2LSB, on chip 2.5V reference

　　- On-chip temperature, charging current, SYS voltage and battery voltage measurement

　　- Touch pressure measurement

　　- 4-wire Touch Screen interface (shared with GPIO pins and ADC input channels)

　　 0℃ to 70℃ operating temperature range

　　 132-ld 10x10x0.85mm dual-row QFN package

　　P95020应用：

　　 Smart Phones

　　 Portable Gaming Device

　　 Digital Media Players

　　 Handheld Computers

　　 Portable Navigational Devices

　　图1。P95020方框图

　　图2。系统功能方框图

　　IDTP95020评估板

　　The IDTP95020 evaluation board serves to demonstrate the features and performance of the IDTP95020 Audio, Power Management and Control integrated circuit. The intuitive top-level layout and control switches simplify the user experience to emphasize the impressive level of integration and abundance of useful features that this device offers.

　　The device can be powered and controlled by a single mini-USB input. If more input power is required, a DC input from wall adapter can be connected.

　　The external EEPROM memory chip is pre-programmed with a basic start-up script that is automatically loaded when power is applied. The device can be reprogrammed to suit the needs of your specific application using the IDTP92020 software tool.

　　The core layout is a 6-layer reference that can be copied and integrated into a larger system design.

　　IDTP95020评估板主要特性：

　　 Reference design layout for easy system integration

　　 Low-cost 6-layer PCB with 1 oz. copper traces

　　 Fully assembled with test points and stand-offs

　　 User-friendly switches (jumper-free)

　　 Single input operation with mini-USB

　　 USB to I2C hardware converter for PC connectivity

　　 EEPROM to store and load start-up script

　　 Software tool for full register and settings control

　　 Optional DC power adapter input for high power applications

　　 LED status indicators for most inputs and outputs